WO1999032590A1 - Filtering apparatus for removing impurities for use in process of preparing grease - Google Patents

Filtering apparatus for removing impurities for use in process of preparing grease Download PDF

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Publication number
WO1999032590A1
WO1999032590A1 PCT/KR1998/000006 KR9800006W WO9932590A1 WO 1999032590 A1 WO1999032590 A1 WO 1999032590A1 KR 9800006 W KR9800006 W KR 9800006W WO 9932590 A1 WO9932590 A1 WO 9932590A1
Authority
WO
WIPO (PCT)
Prior art keywords
grease
filtering apparatus
type filtering
body section
conduit pipe
Prior art date
Application number
PCT/KR1998/000006
Other languages
French (fr)
Inventor
Woo Suk Chae
Dug In Rhee
Sang Ho Choi
Original Assignee
Lg-Caltex Oil Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg-Caltex Oil Corporation filed Critical Lg-Caltex Oil Corporation
Priority to AU56811/98A priority Critical patent/AU5681198A/en
Publication of WO1999032590A1 publication Critical patent/WO1999032590A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/06—Working-up used lubricants to recover useful products ; Cleaning by ultrafiltration or osmosis
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
    • C10M117/04—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen containing hydroxy groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00—Refining fats or fatty oils
    • C11B3/16—Refining fats or fatty oils by mechanical means
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11

Definitions

  • the present invention relates to a filtering apparatus, which is installed in a process of preparing a semi- solid fluid product such as grease, tomato ketchup, mayonnaise and the like, for removing the impurities in the semi -solid fluid product during the process of preparation and for providing the semi-solid fluid product with a homogeneous particle size by an effect of milling of particles. More particularly, the present invention relates to a filtering apparatus which can increase the dropping point of grease, decrease the degree of oil separation, reduce trouble or damage of the grease manufacturing apparatus, and operate a homogenizer in the process at low pressure.
  • a semi- solid fluid product such as grease, tomato ketchup, mayonnaise and the like
  • a conventional process of manufacturing grease essentially comprises an autoclave 1 in which materials such as fatty acid, Li(OH)H 2 0 and the like are introduced and reacted, a cooling kettle 2 for cooling down the intermediate product of grease, a mixing kettle 3 for mixing the intermediate product with additives, a grease filter unit 4 for filtering impurities in the grease, and a homogenizer 5 for homogenizing the particle size of grease.
  • materials such as fatty acid, Li(OH)H 2 0 and the like are introduced and reacted
  • a cooling kettle 2 for cooling down the intermediate product of grease
  • a mixing kettle 3 for mixing the intermediate product with additives
  • a grease filter unit 4 for filtering impurities in the grease
  • a homogenizer 5 for homogenizing the particle size of grease.
  • the special filters are periodically disassembled and overhauled. After overhauling the grease filter unit, the filters can be reused if they are in good condition. However, the filters are damaged sometimes due to the shear stress of impurities when a large amount of impurities exist in the grease. Then, the filters cannot be reused and new filters should be employed.
  • the grease filtered through the grease filter unit is homogenized in the homogenizer 5.
  • the grease homogenized through the homogenizer has a homogeneous particle size.
  • the homogenizer should be operated at a high pressure of 150 — 250 kg/cn , so that the equipment is taken with heavy-load and a large expense of utility is needed.
  • the present inventors have developed a filtering apparatus for removing the impurities in the semi-solid fluid product such as grease, tomato ketchup, mayonnaise and the like, which is able to eliminate the problems that happen in a conventional process of manufacturing grease, and which can improve the physical properties of grease.
  • An object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, for improving the physical properties of grease such as dropping point, degree of oil separation, etc.
  • Another object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, that an overhaul period of the grease filter unit of the conventional process can be extended.
  • a further object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, that the damage of the filters of the conventional process can be prevented.
  • a further object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, for providing particles of grease with an effect of milling.
  • a further object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, that the homogenizer of the conventional process can be operated at a relatively low pressure of about 20 — 150 kg/cm 2 .
  • a further object of the present invention is to provide a filtering apparatus which can be employed to a process of manufacturing a semi- solid product such as tomato ketchup, mayonnaise and the like.
  • Fig. 1 is a schematic diagram of a process for manufacturing grease
  • Fig. 2 is a front view of an embodiment of the filtering apparatus in accordance with the present invention.
  • Fig. 3 is a perspective view of the porous plate 25 which is employed in the filtering apparatus of Fig. 2;
  • Fig. 4 is a front view of another embodiment of the filtering apparatus in accordance with the present invention.
  • Fig. 5 is a perspective view of the porous plate 35 which is employed in the filtering apparatus of Fig. 4.
  • a filtering apparatus is installed at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3, and a filtering apparatus according to the present invention is also installed at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3.
  • a porous plate 35 having a plurality of holes 100 is inserted and tightly fabricated in the filtering apparatus 30 which is installed at the position 10 on the conduit pipe 6. Impurities in the grease are filtered first through the filtering apparatus 30 when the grease flows from the cooling kettle 2 to the mixing kettle 3.
  • a porous plate 25 having a plurality of holes 100 is inserted and tightly fabricated in the filtering apparatus 20 which is installed at the position 11 on the conduit pipe 7. Impurities in the grease are again filtered through the filtering apparatus 20 when the grease circulates to and fro the mixing kettle 3.
  • the filtering apparatus 30 (hereinafter, which is called “drawer type filtering apparatus”) according to the present invention comprises an upper section 31 and a body section 32 which has a flat hole for accommodating a porous plate 35 in the middle part of the body section.
  • the conduit pipe 6 and the upper section are tightly assembled with a plurality of bolts, and the body section and the conduit pipe 6 are tightly assembled also by a plurality of bolts.
  • the door plate 321 is tightly assembled to the body section with a plurality of bolts 322.
  • a valve means 33 may be installed between the body section and the conduit pipe 6.
  • the assembling means for the apparatuses 20 and 30 can be easily - o
  • the filtering apparatus 20 (hereinafter, which is called “fixed type filtering apparatus") according to the present invention comprises an upper section 21, a body section 22, and a porous plate 25 inserted between the upper section and the body section.
  • the conduit pipe 7 and the upper section are tightly assembled with a plurality of bolts, the body section and the conduit pipe 7 are tightly assembled also by a plurality of bolts, and the upper section, the porous plate 25 and the body section are tightly assembled by a plurality of bolts after the porous plate 25 is inserted between the upper section and the body section.
  • the drawer type filtering apparatus 30 may be installed at the position 10 on the conduit pipe 6 and at the position 11 on the conduit pipe 7.
  • the porous plate 25 or 35 has a plurality of small holes which forms a porous part. The removal of impurities in grease and the effect of milling of the grease particles are achieved by passing grease through a plurality of small holes of the porous part.
  • the number and diameter of the small holes 100 and the diameter of the porous part depend upon the capacity of grease manufacturing facilities, for instance, the size of the conduit pipe 6 or 7.
  • the diameter of small holes of the porous plate is in the range of 1.5— 1.7 mm
  • the diameter ( ⁇ ) of the porous part of the porous plate is about 8 inch
  • about 3,000 of holes are formed in the porous part of the porous plate.
  • a conventional process of manufacturing grease essentially comprises an autoclave 1 in which materials such as fatty acid, Li(OH)H 2 0 and the like are introduced and reacted, a cooling kettle 2 for cooling down the intermediate product of grease, a mixing kettle 3 for mixing the intermediate product with additives, a grease filter unit 4 for filtering impurities in the grease, and a homogenizer 5 for homogenizing the particle size of grease.
  • the grease filter unit 4 of the conventional process of preparing grease is to filter the impurities.
  • Specially designed filters are assembled in the grease filter unit, because grease has a high viscosity.
  • grease should be homogeneous.
  • the homogenizer 5 is installed in the conventional process of preparing grease.
  • Such conventional process for manufacturing grease, being equipped with a grease filter unit and a homogenizer, can be easily understood by an ordinary skilled person in the art.
  • the grease filter unit is disassembled and the filters therein are cleaned. After overhauling the grease filter unit, the filters can be reused if they are in good condition. However, the filters are damaged sometimes due to the shear stress of impurities. Then, the filters cannot be reused and new filters should be employed.
  • the grease filtered through the grease filter unit is homogenized in the homogenizer 5.
  • the grease homogenized through the homogenizer has a homogeneous particle size.
  • the homogenizer should be operated at a high pressure of 150 — 250 kg/cnf, so that the equipment is taken with heavy-load and a large expense of utility is needed.
  • a filtering apparatus is installed at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3, and a filtering apparatus is also installed at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3.
  • Figs. 2 and 3 Two types of filtering apparatus have been developed.
  • Fixed type filtering apparatus is shown in Figs. 2 and 3
  • drawer type filtering apparatus is shown in Figs. 4 and 5.
  • Fig. 2 is a front view of the fixed type filtering apparatus in accordance with the present invention
  • Fig. 3 is a perspective view of the porous plate 25 which is employed in the fixed type filtering apparatus of Fig. 2.
  • the fixed type filtering apparatus 20 comprises an upper section 21, a body section 22, and a porous plate 25 inserted between the upper section and the body section.
  • the fixed type filtering apparatus is installed more preferably at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3 rather than at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3. Because the grease passing through the conduit pipe 6 contains more impurities than the grease passing through the conduit pipe 7, and the filtering apparatus installed at the position 10 should be overhauled at intervals shorter than the filtering apparatus installed at the position 11.
  • the upper section 21 of the fixed type filtering apparatus has a conical shape
  • the body section 22 of the fixed type filtering apparatus has a cylindrical shape in the middle and a conical shape at the bottom.
  • the conduit pipe 7 and the upper section are tightly assembled with a plurality of bolts at the upper part of the upper section, the body section and the conduit pipe 7 are tightly assembled also by a plurality of bolts at the bottom part of the body section, and the upper section, the porous plate 25 and the body section are tightly assembled by a plurality of bolts after the porous plate 25 is inserted between the upper section and the body section.
  • a flange is formed at the bottom part of the upper section, and a flange at the upper part of the body section.
  • a plurality of holes 251 are formed in the porous plate so that the upper section, the porous plate and the body section are tightly assembled by a plurality of bolts after the porous plate 25 is inserted between the upper section and the body section.
  • This assembling means can be easily carried out by an ordinary skilled person in the art.
  • this fixed type filtering apparatus can be applied to the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3, as this filtering apparatus has more difficulty in assembling or disassembling than the drawer type filtering apparatus of the present invention, it is preferable that the fixed type filtering apparatus is installed at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3, where the grease contains less impurities than at the position 10.
  • the porous plate 25 of the fixed type filtering apparatus has a plurality of small holes which form a porous part.
  • the removal of impurities in grease and the effect of milling of the grease particles are achieved by passing grease through a plurality of small holes of the porous part.
  • the number and diameter of the small holes 100 and the diameter of the porous part depend upon the capacity of grease manufacturing facilities, for instance, the size of the conduit pipe 6 or 7.
  • the diameter of the small holes of the porous plate is in the range of 1.5 — 1.7 mm
  • the diameter ( ⁇ ) of the porous part of the porous plate is about 8 inch
  • about 3,000 of holes are formed in the porous part of the porous plate.
  • the total of the cross sections of the small holes should be almost equal to the cross section of the the conduit pipe 6 or 7.
  • Fig. 4 is a front view of the drawer type filtering apparatus in accordance with another embodiment of the present invention
  • Fig. 5 is a perspective view of the porous plate 35 which is employed in the drawer type filtering apparatus of Fig. 4.
  • the drawer type filtering apparatus 30 comprises an upper section 31 and a body section 32 which has a flat hole for accommodating a porous plate 35 in the middle part of the body section.
  • the drawer type filtering apparatus is installed more preferably at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3 rather than at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3. Because the grease passing through the conduit pipe 6 contains more impurities than the grease passing through the conduit pipe 7, and the filtering apparatus installed at the position 10 should be overhauled at intervals shorter than the filtering apparatus installed at the position 11.
  • the porous plate 35 is inserted through the flat hole of the body section 32, then the door plate 321 is tightly assembled to the body section with a plurality of bolts 322. It is convenient to overhaul the drawer type filtering apparatus.
  • the plurality of bolts 322 are disassembled, the door plate 321 is removed from the body section 32, and the porous plate is drawn out.
  • the side section of the porous plate is shaped in straight line.
  • a drawing cock 351 is extendedly formed at the end of the front edge.
  • the door plate 321 is closed, and which is assembled to the body section by a plurality of bolts 322 and then sealed. In case of drawing out the porous plate therefrom, the opposite method of assembly is applied.
  • conduit pipe 6 and the upper section are tightly assembled with a plurality of bolts at the upper part of the upper section, and the body section and the conduit pipe 7 are tightly assembled also by a plurality of bolts at the bottom part of the body section.
  • This assembling means can be easily carried out by an ordinary skilled person in the art.
  • a valve means 33 may be installed between the bottom part of the body section and the conduit pipe 6.
  • the drawer type filtering apparatus is installed at the position 10 on the conduit pipe 6, where the grease contains more impurities than at the position 11.
  • the porous plate 35 of the drawer type filtering apparatus has a plurality of small holes which forms a porous part.
  • the removal of impurities in grease and the effect of milling of the grease particles are achieved by passing grease through a plurality of small holes of the porous part.
  • the number and diameter of the small holes 100 and the diameter of the porous part depend upon the capacity of grease manufacturing facilities, for instance, the size of the conduit pipe 6 or 7.
  • the diameter of the small holes of the porous plate is in the range of 1.5 — 1.7 mm
  • the diameter ( ⁇ ) of the porous part of the porous plate is about 8 inch
  • about 3,000 of holes are formed in the porous part of the porous plate.
  • the total of the cross sections of the small holes should be almost equal to the cross section of the the conduit pipe 6 or 7. It is desirable that the porous plates 25 and 35 are made of carbon steel to resist against the pressure of grease in the conduit pipe, and, in case that the inner diameter of the conduit pipe is 3 inch, the thickness of the porous plate is about 7mm .
  • two filtering apparatuses are installed at the positions 10 and 11 in the process of manufacturing grease so as to achieve the objects of the present invention, but one or three of the filtering apparatuses can be installed, if necessary.
  • the filtering apparatus of the present invention a part of the conduit pipe 6 or 7 is partially cut, thereafter the filtering apparatus is installed at the cut part of the conduit pipes.
  • the dropping point of the conventional grease prepared by a conventional process of manufacture without the filtering apparatuses 10 and 11 was in the range of 195 — 220 ° C , and the degree of oil separation thereof was 3.0 ⁇ 8.0% by weight.
  • the dropping point of the grease prepared by the process having the filtering apparatuses 10 and 11 was in the range of 245 — 255 °C , and the degree of oil separation thereof was 2.0 — 3.0% by weight. It was shown that the filtering apparatuses according to the present invention increased the dropping point of grease and reduced the degree of oil separation thereof. In the present invention, the dropping point was measured by ASTM D566, and the degree of oil separation was measured by Federal Standard 321.
  • the life span of the grease filter unit 4 as well as the overhaul period thereof can make longer.
  • the filters in the grease filter unit 4 were used to be damaged by the contaminants, therefore they should be exchanged frequently.
  • the homogenizer 5 can be operated at low pressure.
  • the homogenizer should be operated at the high pressure of 150 — 250 kg/cm 2 because of existence of much contaminants in the grease. This high pressure operation of the homogenizer will incur much expense in utility and cause to damage the equipment.
  • the filtering apparatuses of the present invention can reduce the manufacturing cost of grease by saving the utility expense and making the life span of the homogenizer and grease filter unit longer.
  • the grease manufactured by using the filter apparatus of the present invention has a clear and bright color, which indicates that the impurities therein are removed.
  • the filtering apparatuses of the present invention can apply to a process of manufacturing semi- solid products such as tomato ketchup, mayonnaise and the like.
  • the present invention can be easily carried out by an ordinary skilled person in the art. Many modifications and changes may be deemed to be with the scope of the present invention as defined in the following claims.

Abstract

A filtering apparatus according to the present invention is installed at the position (10) on the conduit pipe (6) which is connected between a cooling kettle (2) and a mixing kettle (3), and a filtering apparatus according to the present invention is also installed at the position (11) on the conduit pipe (7) for circulating grease to and fro the mixing kettle (3). The drawer type filtering apparatus (30) comprises an upper section (31) and a body section (32) which has a flat hole for accommodating a porous plate (35) in the middle part of the body section. The fixed type filtering apparatus (20) comprises an upper section (21), a body section (22), and a porous plate (25) inserted between the upper section and the body section.

Description

Filtering Apparatus for Removing Impurities for Use in Process of Preparing Grease
Field of the Invention
The present invention relates to a filtering apparatus, which is installed in a process of preparing a semi- solid fluid product such as grease, tomato ketchup, mayonnaise and the like, for removing the impurities in the semi -solid fluid product during the process of preparation and for providing the semi-solid fluid product with a homogeneous particle size by an effect of milling of particles. More particularly, the present invention relates to a filtering apparatus which can increase the dropping point of grease, decrease the degree of oil separation, reduce trouble or damage of the grease manufacturing apparatus, and operate a homogenizer in the process at low pressure.
Background of the Invention
Generally, as grease has a high viscosity because of the semi- solid state, special equipments are installed in the preparation process of grease in order to filter the impurities therein and to provide a homogeneous particle size. As shown in Fig. 1, a conventional process of manufacturing grease essentially comprises an autoclave 1 in which materials such as fatty acid, Li(OH)H20 and the like are introduced and reacted, a cooling kettle 2 for cooling down the intermediate product of grease, a mixing kettle 3 for mixing the intermediate product with additives, a grease filter unit 4 for filtering impurities in the grease, and a homogenizer 5 for homogenizing the particle size of grease. Such conventional process for manufacturing grease can be easily understood by an ordinary skilled person in the art.
In the conventional process for preparing grease, impurities in the grease are removed by the grease filter unit 4. Special filters - 9
are assembled and installed in the grease filter unit to filter the impurities, which also are known to an ordinary skilled person in the art. The special filters are periodically disassembled and overhauled. After overhauling the grease filter unit, the filters can be reused if they are in good condition. However, the filters are damaged sometimes due to the shear stress of impurities when a large amount of impurities exist in the grease. Then, the filters cannot be reused and new filters should be employed.
In the conventional process, the grease filtered through the grease filter unit is homogenized in the homogenizer 5. The grease homogenized through the homogenizer has a homogeneous particle size. However, in the conventional process of manufacturing grease, the homogenizer should be operated at a high pressure of 150 — 250 kg/cn , so that the equipment is taken with heavy-load and a large expense of utility is needed.
In the conventional process employing a grease filter unit and a homogenizer, there are also limitations to improvement of physical properties of grease such as dropping point and degree of oil separation. Accordingly, the present inventors have developed a filtering apparatus for removing the impurities in the semi-solid fluid product such as grease, tomato ketchup, mayonnaise and the like, which is able to eliminate the problems that happen in a conventional process of manufacturing grease, and which can improve the physical properties of grease.
Objects of the Invention
An object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, for improving the physical properties of grease such as dropping point, degree of oil separation, etc.
Another object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, that an overhaul period of the grease filter unit of the conventional process can be extended.
A further object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, that the damage of the filters of the conventional process can be prevented.
A further object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, for providing particles of grease with an effect of milling. A further object of the present invention is to provide a filtering apparatus, which is adopted to a conventional process of preparing grease, that the homogenizer of the conventional process can be operated at a relatively low pressure of about 20 — 150 kg/cm2.
A further object of the present invention is to provide a filtering apparatus which can be employed to a process of manufacturing a semi- solid product such as tomato ketchup, mayonnaise and the like.
The forgoing and other objects of the present invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings.
Brief Description of the Drawings
The present invention will be more fully understood by reference to the following detailed description of the preferred embodiment of the present invention when read in conjunction with the accompanying drawings.
Fig. 1 is a schematic diagram of a process for manufacturing grease;
Fig. 2 is a front view of an embodiment of the filtering apparatus in accordance with the present invention;
Fig. 3 is a perspective view of the porous plate 25 which is employed in the filtering apparatus of Fig. 2;
Fig. 4 is a front view of another embodiment of the filtering apparatus in accordance with the present invention; and
Fig. 5 is a perspective view of the porous plate 35 which is employed in the filtering apparatus of Fig. 4.
Summary of the Invention
A filtering apparatus according to the present invention is installed at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3, and a filtering apparatus according to the present invention is also installed at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3.
A porous plate 35 having a plurality of holes 100 is inserted and tightly fabricated in the filtering apparatus 30 which is installed at the position 10 on the conduit pipe 6. Impurities in the grease are filtered first through the filtering apparatus 30 when the grease flows from the cooling kettle 2 to the mixing kettle 3.
A porous plate 25 having a plurality of holes 100 is inserted and tightly fabricated in the filtering apparatus 20 which is installed at the position 11 on the conduit pipe 7. Impurities in the grease are again filtered through the filtering apparatus 20 when the grease circulates to and fro the mixing kettle 3.
The filtering apparatus 30 (hereinafter, which is called "drawer type filtering apparatus") according to the present invention comprises an upper section 31 and a body section 32 which has a flat hole for accommodating a porous plate 35 in the middle part of the body section. The conduit pipe 6 and the upper section are tightly assembled with a plurality of bolts, and the body section and the conduit pipe 6 are tightly assembled also by a plurality of bolts. After the porous plate is inserted to the flat hole of the body section, the door plate 321 is tightly assembled to the body section with a plurality of bolts 322. A valve means 33 may be installed between the body section and the conduit pipe 6. The assembling means for the apparatuses 20 and 30 can be easily - o
understood by an ordinary skilled person in the art.
The filtering apparatus 20 (hereinafter, which is called "fixed type filtering apparatus") according to the present invention comprises an upper section 21, a body section 22, and a porous plate 25 inserted between the upper section and the body section. The conduit pipe 7 and the upper section are tightly assembled with a plurality of bolts, the body section and the conduit pipe 7 are tightly assembled also by a plurality of bolts, and the upper section, the porous plate 25 and the body section are tightly assembled by a plurality of bolts after the porous plate 25 is inserted between the upper section and the body section.
Of course, the drawer type filtering apparatus 30 may be installed at the position 10 on the conduit pipe 6 and at the position 11 on the conduit pipe 7. The porous plate 25 or 35 has a plurality of small holes which forms a porous part. The removal of impurities in grease and the effect of milling of the grease particles are achieved by passing grease through a plurality of small holes of the porous part. The number and diameter of the small holes 100 and the diameter of the porous part depend upon the capacity of grease manufacturing facilities, for instance, the size of the conduit pipe 6 or 7. For example, in case that the inner diameter of the conduit pipe is 3 inch, the diameter of small holes of the porous plate is in the range of 1.5— 1.7 mm, the diameter ( Φ ) of the porous part of the porous plate is about 8 inch, and about 3,000 of holes are formed in the porous part of the porous plate.
Detailed Description of the Preferred Embodiments
As shown in Fig. 1, a conventional process of manufacturing grease essentially comprises an autoclave 1 in which materials such as fatty acid, Li(OH)H20 and the like are introduced and reacted, a cooling kettle 2 for cooling down the intermediate product of grease, a mixing kettle 3 for mixing the intermediate product with additives, a grease filter unit 4 for filtering impurities in the grease, and a homogenizer 5 for homogenizing the particle size of grease.
Generally, grease contains various impurities which will deteriorate physical properties thereof. Therefore, the impurities should be removed. The grease filter unit 4 of the conventional process of preparing grease is to filter the impurities. Specially designed filters are assembled in the grease filter unit, because grease has a high viscosity. Also, grease should be homogeneous. For this purpose, the homogenizer 5 is installed in the conventional process of preparing grease. Such conventional process for manufacturing grease, being equipped with a grease filter unit and a homogenizer, can be easily understood by an ordinary skilled person in the art.
In the conventional process of preparing grease, periodically the grease filter unit is disassembled and the filters therein are cleaned. After overhauling the grease filter unit, the filters can be reused if they are in good condition. However, the filters are damaged sometimes due to the shear stress of impurities. Then, the filters cannot be reused and new filters should be employed. In the conventional process, the grease filtered through the grease filter unit is homogenized in the homogenizer 5. The grease homogenized through the homogenizer has a homogeneous particle size. However, in the conventional process of manufacturing grease, the homogenizer should be operated at a high pressure of 150 — 250 kg/cnf, so that the equipment is taken with heavy-load and a large expense of utility is needed. It is believed that the heavy load is caused by the impurities and non-homogeneity of grease. According to the present invention, a filtering apparatus is installed at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3, and a filtering apparatus is also installed at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3.
In this invention, two types of filtering apparatus have been developed. One, which is called as "fixed type filtering apparatus", is shown in Figs. 2 and 3, the other, which is called as "drawer type filtering apparatus", is shown in Figs. 4 and 5.
Fig. 2 is a front view of the fixed type filtering apparatus in accordance with the present invention, and Fig. 3 is a perspective view of the porous plate 25 which is employed in the fixed type filtering apparatus of Fig. 2.
The fixed type filtering apparatus 20 comprises an upper section 21, a body section 22, and a porous plate 25 inserted between the upper section and the body section. The fixed type filtering apparatus is installed more preferably at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3 rather than at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3. Because the grease passing through the conduit pipe 6 contains more impurities than the grease passing through the conduit pipe 7, and the filtering apparatus installed at the position 10 should be overhauled at intervals shorter than the filtering apparatus installed at the position 11. The upper section 21 of the fixed type filtering apparatus has a conical shape, and the body section 22 of the fixed type filtering apparatus has a cylindrical shape in the middle and a conical shape at the bottom.
The conduit pipe 7 and the upper section are tightly assembled with a plurality of bolts at the upper part of the upper section, the body section and the conduit pipe 7 are tightly assembled also by a plurality of bolts at the bottom part of the body section, and the upper section, the porous plate 25 and the body section are tightly assembled by a plurality of bolts after the porous plate 25 is inserted between the upper section and the body section. A flange is formed at the bottom part of the upper section, and a flange at the upper part of the body section. A plurality of holes 251 are formed in the porous plate so that the upper section, the porous plate and the body section are tightly assembled by a plurality of bolts after the porous plate 25 is inserted between the upper section and the body section. This assembling means can be easily carried out by an ordinary skilled person in the art. Although this fixed type filtering apparatus can be applied to the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3, as this filtering apparatus has more difficulty in assembling or disassembling than the drawer type filtering apparatus of the present invention, it is preferable that the fixed type filtering apparatus is installed at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3, where the grease contains less impurities than at the position 10.
The porous plate 25 of the fixed type filtering apparatus has a plurality of small holes which form a porous part. The removal of impurities in grease and the effect of milling of the grease particles are achieved by passing grease through a plurality of small holes of the porous part. The number and diameter of the small holes 100 and the diameter of the porous part depend upon the capacity of grease manufacturing facilities, for instance, the size of the conduit pipe 6 or 7. For example, in case that the inner diameter of the conduit pipe is 3 inch, the diameter of the small holes of the porous plate is in the range of 1.5 — 1.7 mm, the diameter ( Φ ) of the porous part of the porous plate is about 8 inch, and about 3,000 of holes are formed in the porous part of the porous plate. The total of the cross sections of the small holes should be almost equal to the cross section of the the conduit pipe 6 or 7.
Fig. 4 is a front view of the drawer type filtering apparatus in accordance with another embodiment of the present invention, and Fig. 5 is a perspective view of the porous plate 35 which is employed in the drawer type filtering apparatus of Fig. 4.
The drawer type filtering apparatus 30 comprises an upper section 31 and a body section 32 which has a flat hole for accommodating a porous plate 35 in the middle part of the body section. The drawer type filtering apparatus is installed more preferably at the position 10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3 rather than at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3. Because the grease passing through the conduit pipe 6 contains more impurities than the grease passing through the conduit pipe 7, and the filtering apparatus installed at the position 10 should be overhauled at intervals shorter than the filtering apparatus installed at the position 11.
The porous plate 35 is inserted through the flat hole of the body section 32, then the door plate 321 is tightly assembled to the body section with a plurality of bolts 322. It is convenient to overhaul the drawer type filtering apparatus. In order to overhaul the drawer type filtering apparatus, the plurality of bolts 322 are disassembled, the door plate 321 is removed from the body section 32, and the porous plate is drawn out. In order to insert or draw the porous plate 35 horizontally through the flat hole formed in the middle of the body section 32, the side section of the porous plate is shaped in straight line. In order to draw out the porous plate through the flat hole, a drawing cock 351 is extendedly formed at the end of the front edge. After inserting the porous plate 35 into the body section, the door plate 321 is closed, and which is assembled to the body section by a plurality of bolts 322 and then sealed. In case of drawing out the porous plate therefrom, the opposite method of assembly is applied.
The conduit pipe 6 and the upper section are tightly assembled with a plurality of bolts at the upper part of the upper section, and the body section and the conduit pipe 7 are tightly assembled also by a plurality of bolts at the bottom part of the body section. This assembling means can be easily carried out by an ordinary skilled person in the art. A valve means 33 may be installed between the bottom part of the body section and the conduit pipe 6.
As it is convenient to assemble or disassemble the drawer type filtering apparatus, it is preferable that the drawer type filtering apparatus is installed at the position 10 on the conduit pipe 6, where the grease contains more impurities than at the position 11.
The porous plate 35 of the drawer type filtering apparatus has a plurality of small holes which forms a porous part. The removal of impurities in grease and the effect of milling of the grease particles are achieved by passing grease through a plurality of small holes of the porous part. The number and diameter of the small holes 100 and the diameter of the porous part depend upon the capacity of grease manufacturing facilities, for instance, the size of the conduit pipe 6 or 7. For example, in case that the inner diameter of the conduit pipe is 3 inch, the diameter of the small holes of the porous plate is in the range of 1.5 — 1.7 mm, the diameter ( Φ ) of the porous part of the porous plate is about 8 inch, and about 3,000 of holes are formed in the porous part of the porous plate. The total of the cross sections of the small holes should be almost equal to the cross section of the the conduit pipe 6 or 7. It is desirable that the porous plates 25 and 35 are made of carbon steel to resist against the pressure of grease in the conduit pipe, and, in case that the inner diameter of the conduit pipe is 3 inch, the thickness of the porous plate is about 7mm .
In the present invention, two filtering apparatuses are installed at the positions 10 and 11 in the process of manufacturing grease so as to achieve the objects of the present invention, but one or three of the filtering apparatuses can be installed, if necessary. To install the filtering apparatus of the present invention at the positions 10 and 11, a part of the conduit pipe 6 or 7 is partially cut, thereafter the filtering apparatus is installed at the cut part of the conduit pipes.
After installing the filtering apparatuses 10 and 11 according to the present invention, the physical properties of the manufactured grease are improved. The dropping point of the conventional grease prepared by a conventional process of manufacture without the filtering apparatuses 10 and 11 was in the range of 195 — 220 °C , and the degree of oil separation thereof was 3.0 ~ 8.0% by weight. On the other hand, the dropping point of the grease prepared by the process having the filtering apparatuses 10 and 11 was in the range of 245 — 255 °C , and the degree of oil separation thereof was 2.0 — 3.0% by weight. It was shown that the filtering apparatuses according to the present invention increased the dropping point of grease and reduced the degree of oil separation thereof. In the present invention, the dropping point was measured by ASTM D566, and the degree of oil separation was measured by Federal Standard 321.
If the filtering apparatuses 10 and 11 of the present invention are installed in the conventional process of manufacturing grease, the life span of the grease filter unit 4 as well as the overhaul period thereof can make longer. In the conventional process of manufacturing grease, the filters in the grease filter unit 4 were used to be damaged by the contaminants, therefore they should be exchanged frequently. Also, if the filtering apparatuses 10 and 11 of the present invention are installed, the homogenizer 5 can be operated at low pressure. In the conventional process of manufacturing grease, the homogenizer should be operated at the high pressure of 150 — 250 kg/cm2 because of existence of much contaminants in the grease. This high pressure operation of the homogenizer will incur much expense in utility and cause to damage the equipment. However, in the process of manufacturing grease in accordance with the present invention, a high quality of grease can be obtained even if the homogenizer 5 is operated at the relatively low pressure of 20 — 150 kg/cm'. Accordingly, the filtering apparatuses of the present invention can reduce the manufacturing cost of grease by saving the utility expense and making the life span of the homogenizer and grease filter unit longer.
Also, the grease manufactured by using the filter apparatus of the present invention has a clear and bright color, which indicates that the impurities therein are removed.
The filtering apparatuses of the present invention can apply to a process of manufacturing semi- solid products such as tomato ketchup, mayonnaise and the like. The present invention can be easily carried out by an ordinary skilled person in the art. Many modifications and changes may be deemed to be with the scope of the present invention as defined in the following claims.

Claims

What is claimed is:
1. In a conventional process of manufacturing grease essentially comprising an autoclave 1 in which materials such as fatty acid, Li(OH)H20 and the like are introduced and reacted, a cooling kettle 2 for cooling down the intermediate product of grease, a mixing kettle 3 for mixing the intermediate product with additives, a grease filter unit 4 for filtering impurities in the grease, and a homogenizer 5 for homogenizing the particle size of grease, a fixed type filtering apparatus 20, which comprises: an upper section 21; a body section 22; and a porous plate 25 being installed between said upper section and said body section, and having a plurality of small holes 100 through which grease is passed, said fixed type filtering apparatus 20 being installed at the position 10 on the conduit pipe 6 which is connected between the cooling kettle 2 and the mixing kettle 3, and at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3.
2. The fixed type filtering apparatus 20 as defined in claim 1 wherein said porous plate 25 has a plurality of small holes 100 having the diameter of 1.5 — 1.7mm, the plurality of small holes forming a porous part having the diameter ( Φ ) of about 8 inches in case that the inner diameter of the conduit pipe is 3 inches.
3. The fixed type filtering apparatus 20 as defined in claim 1 wherein said porous plate 25 is tightly assembled between said upper section 21 and said body section 22 by a plurality of bolts.
4. The fixed type filtering apparatus 20 as defined in claim 1 wherein said upper section 21 has a conical shape.
5. The fixed type filtering apparatus 20 as defined in claim 1 wherein said body section 22 has a cylindrical shape in the middle and a conical shape at the bottom.
6. In a conventional process of manufacturing grease essentially comprising an autoclave 1 in which materials such as fatty acid, Li(OH)H20 and the like are introduced and reacted, a cooling kettle 2 for cooling down the intermediate product of grease, a mixing kettle 3 for mixing the intermediate product with additives, a grease filter unit 4 for filtering impurities in the grease, and a homogenizer 5 for homogenizing the particle size of grease, a drawer type filtering apparatus 30, which comprises: an upper section 31; a porous plate 35 having a plurality of small holes 100 through which grease is passed; and a body section 32 which has a flat hole for accommodating the porous plate in the middle part of the body section, said drawer type filtering apparatus 30 being installed at the position 10 on the conduit pipe 6 which is connected between the cooling kettle 2 and the mixing kettle 3, and at the position 11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle 3.
7. The drawer type filtering apparatus 30 as defined in claim 6 wherein said porous plate 35 has a plurality of small holes 100 having the diameter of 1.5 — 1.7mm, and is shaped in straight line at the both sides, the plurality of small holes forming a porous part having the diameter( Φ i) of about 8 inches in case that the inner diameter of the conduit pipe is 3 inches.
8. The drawer type filtering apparatus 30 as defined in claim 6 wherein said porous plate 35 is inserted through the flat hole formed in the middle of said body section 32, and then the door plate 321 is tightly assembled to the body section with a plurality of bolts 322.
9. The drawer type filtering apparatus 30 as defined in claim 6 wherein said upper section 31 has a conical shape.
10. The drawer type filtering apparatus 30 as defined in claim 6 wherein said body section 32 has a cylindrical shape in the middle and a conical shape at the bottom.
11. In a method of preparing grease by using a process comprising an autoclave 1 in which materials such as fatty acid, Li(OH)H20 and the like are introduced and reacted, a cooling kettle 2 for cooling down the intermediate product of grease, a mixing kettle 3 for mixing the intermediate product with additives, a grease filter unit 4 for filtering impurities in the grease, and a homogenizer 5 for homogenizing the particle size of grease, an improvement for preparing grease, which comprises: passing grease flowing from the cooling kettle through the drawer type filtering apparatus 30 of claim 6 which is installed at the position
10 on the conduit pipe 6 which is connected between a cooling kettle 2 and a mixing kettle 3; passing grease circulating from the mixing kettle through the fixed type filtering apparatus 20 of claim 1 which is installed at the position
11 on the conduit pipe 7 for circulating grease to and fro the mixing kettle; and operating said homogenizer 5 at the pressure of 20 ΓÇö 150kg/cm\
12. A grease prepared according to the method of claim 11, which is characterized by the dropping point having the range of 245 ΓÇö 255 ┬░C and the degree of oil separation having 2.0 ΓÇö 3.0% by weight.
PCT/KR1998/000006 1997-12-23 1998-01-16 Filtering apparatus for removing impurities for use in process of preparing grease WO1999032590A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56811/98A AU5681198A (en) 1997-12-23 1998-01-16 Filtering apparatus for removing impurities for use in process of preparing grease

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1997/72699 1997-12-23
KR1019970072699A KR100240821B1 (en) 1997-12-23 1997-12-23 Process for preparation of grease and filter of the same

Publications (1)

Publication Number Publication Date
WO1999032590A1 true WO1999032590A1 (en) 1999-07-01

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KR (1) KR100240821B1 (en)
AU (1) AU5681198A (en)
WO (1) WO1999032590A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151825A2 (en) * 1984-01-04 1985-08-21 Shell Internationale Researchmaatschappij B.V. Process for the continuous manufacture of a lubricating grease
US5074381A (en) * 1990-09-24 1991-12-24 Westinghouse Electric Corp. Apparatus for removing solid particulates from oil
EP0535290A1 (en) * 1991-09-02 1993-04-07 Primavesi, Markus Process and apparatus for continuous production of fatty acid esters

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069799A (en) * 1989-09-07 1991-12-03 Exxon Research & Engineering Company Method for rejuvenating lubricating oils
KR970042974A (en) * 1995-12-21 1997-07-26 전성원 Grease composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151825A2 (en) * 1984-01-04 1985-08-21 Shell Internationale Researchmaatschappij B.V. Process for the continuous manufacture of a lubricating grease
US5074381A (en) * 1990-09-24 1991-12-24 Westinghouse Electric Corp. Apparatus for removing solid particulates from oil
EP0535290A1 (en) * 1991-09-02 1993-04-07 Primavesi, Markus Process and apparatus for continuous production of fatty acid esters

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KR100240821B1 (en) 2000-01-15
KR19990053113A (en) 1999-07-15
AU5681198A (en) 1999-07-12

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